Question

Predict a student’s GPA (y) based upon the number of hours studied per week (x).

Hours/week	GPA
5	2.5
10	3.1
12	3.3
20	3.8
15	3.7
12	3.5

Using the correct answer from the previous question, predict the GPA of someone who studies 10 hours?

a) 2.5

b) 2.7

c) 2.9

d) 3.1

Answer 1

(i)

From the given data, the following Table is calculated:

X	Y	XY	X2
5	2.5	12.5	25
10	3.1	31	100
12	3.3	39.6	144
20	3.8	76	400
15	3.7	55.5	225
12	3.5	42	144
Total = 74	19.9	256.6	1038

So,

Predict a student’s GPA (y) based upon the number of hours studied per week (x). is given by:

(ii)

For x = 10, we get:

So,

Correct option:

(d)   3.1